Abstract
This paper designs and discusses black-start scheme based on a gas-steam combined cycle power plant (CCPP) in Tianjin power grid of China. First, considering the structure characteristics and station service power connection mode of the gas-steam unit, the diesel generator is chosen as fast self-starting unit. Also two self-starting schemes of direct starting and variable frequency starting are designed. Second, the technical feasibility of two schemes is determined through first loading capability test and bus voltage level test. After investment estimation comparison, the scheme II is chosen as recommended scheme. The research process proposed in this paper has certain reference significance to power grid black-start.
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